diff --git a/io.h b/io.h
index 73e5d9dc819625146688b8511e992abb2984d59d..7d04e0b9b3a905067f8b97790d7079113e298eb3 100644
--- a/io.h
+++ b/io.h
@@ -1,5 +1,5 @@
 /* io.h */
-/* Last Change: 2019/05/21 (Tue) 13:55:21. */
+/* Last Change: 2019/05/21 (Tue) 14:01:43. */
 #ifndef _IO_H_
 #define _IO_H_
 
@@ -39,7 +39,4 @@ void read_problem(void);
 void convert_answer(void);
 void print_answer(void);
 
-//  関数avgのプロトタイプ宣言
-double avg(double,double);
-
 #endif // _IO_H_
diff --git a/main.c b/main.c
index 928cf3fe9fd725c7cce348159c202fd333270ace..3952e52cbc65dc28d030e4b0a206301aee88da05 100644
--- a/main.c
+++ b/main.c
@@ -1,12 +1,11 @@
 /* main.c */
-/* Last Change: 2019/05/21 (Tue) 13:57:57. */
+/* Last Change: 2019/05/21 (Tue) 14:03:16. */
 
 #include"io.h"
 
 int main(void){
 	read_problem();
 	// solver();
-	w=h=10; // for output
 	convert_answer();
 	print_answer();
 
diff --git a/solver.c b/solver.c
new file mode 100644
index 0000000000000000000000000000000000000000..d7262da3c415a994328e7ffb4bf1add00dd008b8
--- /dev/null
+++ b/solver.c
@@ -0,0 +1,14 @@
+/* solver.c */
+/* Last Change: 2019/05/21 (Tue) 14:03:02. */
+
+#include<stdio.h>
+/* #include<stdlib.h> */
+/* #include<string.h> */
+/* #include<limits.h> */
+/* #include<math.h> */
+/* #include<time.h> */
+
+void solver(void){
+	return;
+}
+
diff --git a/solver.h b/solver.h
new file mode 100644
index 0000000000000000000000000000000000000000..e90033da802910604ece9941affa4f6f945b0882
--- /dev/null
+++ b/solver.h
@@ -0,0 +1,10 @@
+/* solver.h */
+/* Last Change: 2019/05/21 (Tue) 14:01:34. */
+#ifndef _SOLVER_H_
+#define _SOLVER_H_
+
+#define MAXSIZE 128
+
+void solver(void);
+
+#endif // _SOLVER_H_